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iwlegacy: merge il_lib_ops into il_ops 

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka 2012-02-13 11:23:18 +01:00 committed by John W. Linville
parent f03ee2a87e
commit 1600b87542
8 changed files with 71 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/iwlegacy/3945-mac.c
View File

@ -616,7 +616,7 @@ il3945_tx_skb(struct il_priv *il, struct sk_buff *skb)
/* Add buffer containing Tx command and MAC(!) header to TFD's /* Add buffer containing Tx command and MAC(!) header to TFD's
* first entry */ * first entry */
il->ops->lib->txq_attach_buf_to_tfd(il, txq, txcmd_phys, len, 1, 0); il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, len, 1, 0);
/* Set up TFD's 2nd entry to point directly to remainder of skb, /* Set up TFD's 2nd entry to point directly to remainder of skb,
* if any (802.11 null frames have no payload). */ * if any (802.11 null frames have no payload). */
@ -625,8 +625,8 @@ il3945_tx_skb(struct il_priv *il, struct sk_buff *skb)
phys_addr = phys_addr =
pci_map_single(il->pci_dev, skb->data + hdr_len, len, pci_map_single(il->pci_dev, skb->data + hdr_len, len,
PCI_DMA_TODEVICE); PCI_DMA_TODEVICE);
il->ops->lib->txq_attach_buf_to_tfd(il, txq, phys_addr, len, 0, il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, len, 0,
U32_PAD(len)); U32_PAD(len));
} }
/* Tell device the write idx *just past* this latest filled TFD */ /* Tell device the write idx *just past* this latest filled TFD */
@ -2413,7 +2413,7 @@ __il3945_up(struct il_priv *il)
/* load bootstrap state machine, /* load bootstrap state machine,
* load bootstrap program into processor's memory, * load bootstrap program into processor's memory,
* prepare to load the "initialize" uCode */ * prepare to load the "initialize" uCode */
rc = il->ops->lib->load_ucode(il); rc = il->ops->load_ucode(il);
if (rc) { if (rc) {
IL_ERR("Unable to set up bootstrap uCode: %d\n", rc); IL_ERR("Unable to set up bootstrap uCode: %d\n", rc);

29
drivers/net/wireless/iwlegacy/3945.c
View File

@ -303,7 +303,7 @@ il3945_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
skb = txq->skbs[txq->q.read_ptr]; skb = txq->skbs[txq->q.read_ptr];
ieee80211_tx_status_irqsafe(il->hw, skb); ieee80211_tx_status_irqsafe(il->hw, skb);
txq->skbs[txq->q.read_ptr] = NULL; txq->skbs[txq->q.read_ptr] = NULL;
il->ops->lib->txq_free_tfd(il, txq); il->ops->txq_free_tfd(il, txq);
} }
if (il_queue_space(q) > q->low_mark && txq_id >= 0 && if (il_queue_space(q) > q->low_mark && txq_id >= 0 &&
@ -1612,7 +1612,7 @@ il3945_hw_reg_comp_txpower_temp(struct il_priv *il)
} }
/* send Txpower command for current channel to ucode */ /* send Txpower command for current channel to ucode */
return il->ops->lib->send_tx_power(il); return il->ops->send_tx_power(il);
} }
int int
@ -2634,19 +2634,6 @@ static struct il_hcmd_ops il3945_hcmd = {
.commit_rxon = il3945_commit_rxon, .commit_rxon = il3945_commit_rxon,
}; };
static struct il_lib_ops il3945_lib = {
.txq_attach_buf_to_tfd = il3945_hw_txq_attach_buf_to_tfd,
.txq_free_tfd = il3945_hw_txq_free_tfd,
.txq_init = il3945_hw_tx_queue_init,
.load_ucode = il3945_load_bsm,
.dump_nic_error_log = il3945_dump_nic_error_log,
.apm_init = il3945_apm_init,
.send_tx_power = il3945_send_tx_power,
.is_valid_rtc_data_addr = il3945_hw_valid_rtc_data_addr,
.eeprom_acquire_semaphore = il3945_eeprom_acquire_semaphore,
.eeprom_release_semaphore = il3945_eeprom_release_semaphore,
};
static const struct il_legacy_ops il3945_legacy_ops = { static const struct il_legacy_ops il3945_legacy_ops = {
.post_associate = il3945_post_associate, .post_associate = il3945_post_associate,
.config_ap = il3945_config_ap, .config_ap = il3945_config_ap,
@ -2661,7 +2648,17 @@ static struct il_hcmd_utils_ops il3945_hcmd_utils = {
}; };
const struct il_ops il3945_ops = { const struct il_ops il3945_ops = {
.lib = &il3945_lib, .txq_attach_buf_to_tfd = il3945_hw_txq_attach_buf_to_tfd,
.txq_free_tfd = il3945_hw_txq_free_tfd,
.txq_init = il3945_hw_tx_queue_init,
.load_ucode = il3945_load_bsm,
.dump_nic_error_log = il3945_dump_nic_error_log,
.apm_init = il3945_apm_init,
.send_tx_power = il3945_send_tx_power,
.is_valid_rtc_data_addr = il3945_hw_valid_rtc_data_addr,
.eeprom_acquire_semaphore = il3945_eeprom_acquire_semaphore,
.eeprom_release_semaphore = il3945_eeprom_release_semaphore,
.hcmd = &il3945_hcmd, .hcmd = &il3945_hcmd,
.utils = &il3945_hcmd_utils, .utils = &il3945_hcmd_utils,
.led = &il3945_led_ops, .led = &il3945_led_ops,

4
drivers/net/wireless/iwlegacy/4965-calib.c
View File

@ -923,8 +923,8 @@ il4965_chain_noise_calibration(struct il_priv *il, void *stat_resp)
/* Some power changes may have been made during the calibration. /* Some power changes may have been made during the calibration.
* Update and commit the RXON * Update and commit the RXON
*/ */
if (il->ops->lib->update_chain_flags) if (il->ops->update_chain_flags)
il->ops->lib->update_chain_flags(il); il->ops->update_chain_flags(il);
data->state = IL_CHAIN_NOISE_DONE; data->state = IL_CHAIN_NOISE_DONE;
il_power_update_mode(il, false); il_power_update_mode(il, false);

23
drivers/net/wireless/iwlegacy/4965-mac.c
View File

@ -1811,7 +1811,7 @@ il4965_tx_skb(struct il_priv *il, struct sk_buff *skb)
dma_unmap_len_set(out_meta, len, firstlen); dma_unmap_len_set(out_meta, len, firstlen);
/* Add buffer containing Tx command and MAC(!) header to TFD's /* Add buffer containing Tx command and MAC(!) header to TFD's
* first entry */ * first entry */
il->ops->lib->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0); il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
if (!ieee80211_has_morefrags(hdr->frame_control)) { if (!ieee80211_has_morefrags(hdr->frame_control)) {
txq->need_update = 1; txq->need_update = 1;
@ -1827,8 +1827,8 @@ il4965_tx_skb(struct il_priv *il, struct sk_buff *skb)
phys_addr = phys_addr =
pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen, pci_map_single(il->pci_dev, skb->data + hdr_len, secondlen,
PCI_DMA_TODEVICE); PCI_DMA_TODEVICE);
il->ops->lib->txq_attach_buf_to_tfd(il, txq, phys_addr, il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen,
secondlen, 0, 0); 0, 0);
} }
scratch_phys = scratch_phys =
@ -1848,8 +1848,7 @@ il4965_tx_skb(struct il_priv *il, struct sk_buff *skb)
/* Set up entry for this TFD in Tx byte-count array */ /* Set up entry for this TFD in Tx byte-count array */
if (info->flags & IEEE80211_TX_CTL_AMPDU) if (info->flags & IEEE80211_TX_CTL_AMPDU)
il->ops->lib->txq_update_byte_cnt_tbl(il, txq, il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len));
le16_to_cpu(tx_cmd->len));
pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys, firstlen, pci_dma_sync_single_for_device(il->pci_dev, txcmd_phys, firstlen,
PCI_DMA_BIDIRECTIONAL); PCI_DMA_BIDIRECTIONAL);
@ -2470,7 +2469,7 @@ il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE); il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE);
txq->skbs[txq->q.read_ptr] = NULL; txq->skbs[txq->q.read_ptr] = NULL;
il->ops->lib->txq_free_tfd(il, txq); il->ops->txq_free_tfd(il, txq);
} }
return nfreed; return nfreed;
} }
@ -5072,7 +5071,7 @@ il4965_dump_nic_error_log(struct il_priv *il)
else else
base = le32_to_cpu(il->card_alive.error_event_table_ptr); base = le32_to_cpu(il->card_alive.error_event_table_ptr);
if (!il->ops->lib->is_valid_rtc_data_addr(base)) { if (!il->ops->is_valid_rtc_data_addr(base)) {
IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n", IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n",
base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT"); base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT");
return; return;
@ -5574,7 +5573,7 @@ __il4965_up(struct il_priv *il)
/* load bootstrap state machine, /* load bootstrap state machine,
* load bootstrap program into processor's memory, * load bootstrap program into processor's memory,
* prepare to load the "initialize" uCode */ * prepare to load the "initialize" uCode */
ret = il->ops->lib->load_ucode(il); ret = il->ops->load_ucode(il);
if (ret) { if (ret) {
IL_ERR("Unable to set up bootstrap uCode: %d\n", ret); IL_ERR("Unable to set up bootstrap uCode: %d\n", ret);
@ -5615,7 +5614,7 @@ il4965_bg_init_alive_start(struct work_struct *data)
if (test_bit(S_EXIT_PENDING, &il->status)) if (test_bit(S_EXIT_PENDING, &il->status))
goto out; goto out;
il->ops->lib->init_alive_start(il); il->ops->init_alive_start(il);
out: out:
mutex_unlock(&il->mutex); mutex_unlock(&il->mutex);
} }
@ -6047,7 +6046,7 @@ il4965_mac_channel_switch(struct ieee80211_hw *hw,
if (!il_is_associated(il)) if (!il_is_associated(il))
goto out; goto out;
if (!il->ops->lib->set_channel_switch) if (!il->ops->set_channel_switch)
goto out; goto out;
ch = channel->hw_value; ch = channel->hw_value;
@ -6099,7 +6098,7 @@ il4965_mac_channel_switch(struct ieee80211_hw *hw,
*/ */
set_bit(S_CHANNEL_SWITCH_PENDING, &il->status); set_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
il->switch_channel = cpu_to_le16(ch); il->switch_channel = cpu_to_le16(ch);
if (il->ops->lib->set_channel_switch(il, ch_switch)) { if (il->ops->set_channel_switch(il, ch_switch)) {
clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status); clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
il->switch_channel = 0; il->switch_channel = 0;
ieee80211_chswitch_done(il->vif, false); ieee80211_chswitch_done(il->vif, false);
@ -6182,7 +6181,7 @@ il4965_bg_txpower_work(struct work_struct *work)
/* Regardless of if we are associated, we must reconfigure the /* Regardless of if we are associated, we must reconfigure the
* TX power since frames can be sent on non-radar channels while * TX power since frames can be sent on non-radar channels while
* not associated */ * not associated */
il->ops->lib->send_tx_power(il); il->ops->send_tx_power(il);
/* Update last_temperature to keep is_calib_needed from running /* Update last_temperature to keep is_calib_needed from running
* when it isn't needed... */ * when it isn't needed... */

19
drivers/net/wireless/iwlegacy/4965.c
View File

@ -1889,7 +1889,14 @@ static struct il_hcmd_utils_ops il4965_hcmd_utils = {
.post_scan = il4965_post_scan, .post_scan = il4965_post_scan,
}; };
static struct il_lib_ops il4965_lib = { static const struct il_legacy_ops il4965_legacy_ops = {
.post_associate = il4965_post_associate,
.config_ap = il4965_config_ap,
.manage_ibss_station = il4965_manage_ibss_station,
.update_bcast_stations = il4965_update_bcast_stations,
};
const struct il_ops il4965_ops = {
.txq_update_byte_cnt_tbl = il4965_txq_update_byte_cnt_tbl, .txq_update_byte_cnt_tbl = il4965_txq_update_byte_cnt_tbl,
.txq_attach_buf_to_tfd = il4965_hw_txq_attach_buf_to_tfd, .txq_attach_buf_to_tfd = il4965_hw_txq_attach_buf_to_tfd,
.txq_free_tfd = il4965_hw_txq_free_tfd, .txq_free_tfd = il4965_hw_txq_free_tfd,
@ -1905,17 +1912,7 @@ static struct il_lib_ops il4965_lib = {
.update_chain_flags = il4965_update_chain_flags, .update_chain_flags = il4965_update_chain_flags,
.eeprom_acquire_semaphore = il4965_eeprom_acquire_semaphore, .eeprom_acquire_semaphore = il4965_eeprom_acquire_semaphore,
.eeprom_release_semaphore = il4965_eeprom_release_semaphore, .eeprom_release_semaphore = il4965_eeprom_release_semaphore,
};
static const struct il_legacy_ops il4965_legacy_ops = {
.post_associate = il4965_post_associate,
.config_ap = il4965_config_ap,
.manage_ibss_station = il4965_manage_ibss_station,
.update_bcast_stations = il4965_update_bcast_stations,
};
const struct il_ops il4965_ops = {
.lib = &il4965_lib,
.hcmd = &il4965_hcmd, .hcmd = &il4965_hcmd,
.utils = &il4965_hcmd_utils, .utils = &il4965_hcmd_utils,
.led = &il4965_led_ops, .led = &il4965_led_ops,

34
drivers/net/wireless/iwlegacy/common.c
View File

@ -730,7 +730,7 @@ il_eeprom_init(struct il_priv *il)
} }
e = (__le16 *) il->eeprom; e = (__le16 *) il->eeprom;
il->ops->lib->apm_init(il); il->ops->apm_init(il);
ret = il_eeprom_verify_signature(il); ret = il_eeprom_verify_signature(il);
if (ret < 0) { if (ret < 0) {
@ -740,7 +740,7 @@ il_eeprom_init(struct il_priv *il)
} }
/* Make sure driver (instead of uCode) is allowed to read EEPROM */ /* Make sure driver (instead of uCode) is allowed to read EEPROM */
ret = il->ops->lib->eeprom_acquire_semaphore(il); ret = il->ops->eeprom_acquire_semaphore(il);
if (ret < 0) { if (ret < 0) {
IL_ERR("Failed to acquire EEPROM semaphore.\n"); IL_ERR("Failed to acquire EEPROM semaphore.\n");
ret = -ENOENT; ret = -ENOENT;
@ -772,7 +772,7 @@ il_eeprom_init(struct il_priv *il)
ret = 0; ret = 0;
done: done:
il->ops->lib->eeprom_release_semaphore(il); il->ops->eeprom_release_semaphore(il);
err: err:
if (ret) if (ret)
@ -1155,9 +1155,9 @@ il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)) if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
clear_bit(S_POWER_PMI, &il->status); clear_bit(S_POWER_PMI, &il->status);
if (il->ops->lib->update_chain_flags && update_chains) if (il->ops->update_chain_flags && update_chains)
il->ops->lib->update_chain_flags(il); il->ops->update_chain_flags(il);
else if (il->ops->lib->update_chain_flags) else if (il->ops->update_chain_flags)
D_POWER("Cannot update the power, chain noise " D_POWER("Cannot update the power, chain noise "
"calibration running: %d\n", "calibration running: %d\n",
il->chain_noise_data.state); il->chain_noise_data.state);
@ -2719,7 +2719,7 @@ il_tx_queue_unmap(struct il_priv *il, int txq_id)
return; return;
while (q->write_ptr != q->read_ptr) { while (q->write_ptr != q->read_ptr) {
il->ops->lib->txq_free_tfd(il, txq); il->ops->txq_free_tfd(il, txq);
q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd); q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
} }
} }
@ -3019,7 +3019,7 @@ il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id); il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
/* Tell device where to find queue */ /* Tell device where to find queue */
il->ops->lib->txq_init(il, txq); il->ops->txq_init(il, txq);
return 0; return 0;
err: err:
@ -3050,7 +3050,7 @@ il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq, int slots_num,
il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id); il_queue_init(il, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
/* Tell device where to find queue */ /* Tell device where to find queue */
il->ops->lib->txq_init(il, txq); il->ops->txq_init(il, txq);
} }
EXPORT_SYMBOL(il_tx_queue_reset); EXPORT_SYMBOL(il_tx_queue_reset);
@ -3157,9 +3157,9 @@ il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
#endif #endif
txq->need_update = 1; txq->need_update = 1;
if (il->ops->lib->txq_update_byte_cnt_tbl) if (il->ops->txq_update_byte_cnt_tbl)
/* Set up entry in queue's byte count circular buffer */ /* Set up entry in queue's byte count circular buffer */
il->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0); il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
phys_addr = phys_addr =
pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size, pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
@ -3167,7 +3167,7 @@ il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
dma_unmap_addr_set(out_meta, mapping, phys_addr); dma_unmap_addr_set(out_meta, mapping, phys_addr);
dma_unmap_len_set(out_meta, len, fix_size); dma_unmap_len_set(out_meta, len, fix_size);
il->ops->lib->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1, il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
U32_PAD(cmd->len)); U32_PAD(cmd->len));
/* Increment and update queue's write idx */ /* Increment and update queue's write idx */
@ -4101,9 +4101,9 @@ il_irq_handle_error(struct il_priv *il)
IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version); IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
il->ops->lib->dump_nic_error_log(il); il->ops->dump_nic_error_log(il);
if (il->ops->lib->dump_fh) if (il->ops->dump_fh)
il->ops->lib->dump_fh(il, NULL, false); il->ops->dump_fh(il, NULL, false);
#ifdef CONFIG_IWLEGACY_DEBUG #ifdef CONFIG_IWLEGACY_DEBUG
if (il_get_debug_level(il) & IL_DL_FW_ERRORS) if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
il_print_rx_config_cmd(il); il_print_rx_config_cmd(il);
@ -4290,7 +4290,7 @@ il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
if (il->tx_power_user_lmt == tx_power && !force) if (il->tx_power_user_lmt == tx_power && !force)
return 0; return 0;
if (!il->ops->lib->send_tx_power) if (!il->ops->send_tx_power)
return -EOPNOTSUPP; return -EOPNOTSUPP;
/* 0 dBm mean 1 milliwatt */ /* 0 dBm mean 1 milliwatt */
@ -4323,7 +4323,7 @@ il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
prev_tx_power = il->tx_power_user_lmt; prev_tx_power = il->tx_power_user_lmt;
il->tx_power_user_lmt = tx_power; il->tx_power_user_lmt = tx_power;
ret = il->ops->lib->send_tx_power(il); ret = il->ops->send_tx_power(il);
/* if fail to set tx_power, restore the orig. tx power */ /* if fail to set tx_power, restore the orig. tx power */
if (ret) { if (ret) {

31
drivers/net/wireless/iwlegacy/common.h
View File

@ -1578,7 +1578,20 @@ struct il_debugfs_ops {
}; };
#endif #endif
struct il_lib_ops { struct il_led_ops {
int (*cmd) (struct il_priv *il, struct il_led_cmd *led_cmd);
};
struct il_legacy_ops {
void (*post_associate) (struct il_priv *il);
void (*config_ap) (struct il_priv *il);
/* station management */
int (*update_bcast_stations) (struct il_priv *il);
int (*manage_ibss_station) (struct il_priv *il,
struct ieee80211_vif *vif, bool add);
};
struct il_ops {
/* Handling TX */ /* Handling TX */
void (*txq_update_byte_cnt_tbl) (struct il_priv *il, void (*txq_update_byte_cnt_tbl) (struct il_priv *il,
struct il_tx_queue *txq, struct il_tx_queue *txq,
@ -1609,23 +1622,7 @@ struct il_lib_ops {
/* eeprom operations */ /* eeprom operations */
int (*eeprom_acquire_semaphore) (struct il_priv *il); int (*eeprom_acquire_semaphore) (struct il_priv *il);
void (*eeprom_release_semaphore) (struct il_priv *il); void (*eeprom_release_semaphore) (struct il_priv *il);
};
struct il_led_ops {
int (*cmd) (struct il_priv *il, struct il_led_cmd *led_cmd);
};
struct il_legacy_ops {
void (*post_associate) (struct il_priv *il);
void (*config_ap) (struct il_priv *il);
/* station management */
int (*update_bcast_stations) (struct il_priv *il);
int (*manage_ibss_station) (struct il_priv *il,
struct ieee80211_vif *vif, bool add);
};
struct il_ops {
const struct il_lib_ops *lib;
const struct il_hcmd_ops *hcmd; const struct il_hcmd_ops *hcmd;
const struct il_hcmd_utils_ops *utils; const struct il_hcmd_utils_ops *utils;
const struct il_led_ops *led; const struct il_led_ops *led;

4
drivers/net/wireless/iwlegacy/debug.c
View File

@ -1178,8 +1178,8 @@ il_dbgfs_fh_reg_read(struct file *file, char __user *user_buf, size_t count,
int pos = 0; int pos = 0;
ssize_t ret = -EFAULT; ssize_t ret = -EFAULT;
if (il->ops->lib->dump_fh) { if (il->ops->dump_fh) {
ret = pos = il->ops->lib->dump_fh(il, &buf, true); ret = pos = il->ops->dump_fh(il, &buf, true);
if (buf) { if (buf) {
ret = ret =
simple_read_from_buffer(user_buf, count, ppos, buf, simple_read_from_buffer(user_buf, count, ppos, buf,