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mmc: core: Minor simplifications to __mmc_switch 

Instead of using several references to card->host, let's use a local
variable. That means we can remove the BUG_ON verifications for the
same pointers.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
This commit is contained in:
Ulf Hansson 2014-01-28 14:05:39 +01:00 committed by Chris Ball
parent 4509f84775
commit 636bd13c12
1 changed files with 9 additions and 11 deletions
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20
drivers/mmc/core/mmc_ops.c
View File

@ -413,14 +413,12 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
unsigned int timeout_ms, bool use_busy_signal, bool send_status, unsigned int timeout_ms, bool use_busy_signal, bool send_status,
bool ignore_crc) bool ignore_crc)
{ {
struct mmc_host *host = card->host;
int err; int err;
struct mmc_command cmd = {0}; struct mmc_command cmd = {0};
unsigned long timeout; unsigned long timeout;
u32 status = 0; u32 status = 0;
BUG_ON(!card);
BUG_ON(!card->host);
cmd.opcode = MMC_SWITCH; cmd.opcode = MMC_SWITCH;
cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
(index << 16) | (index << 16) |
@ -437,7 +435,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
if (index == EXT_CSD_SANITIZE_START) if (index == EXT_CSD_SANITIZE_START)
cmd.sanitize_busy = true; cmd.sanitize_busy = true;
err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
if (err) if (err)
return err; return err;
@ -449,7 +447,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
* CRC errors shall only be ignored in cases were CMD13 is used to poll * CRC errors shall only be ignored in cases were CMD13 is used to poll
* to detect busy completion. * to detect busy completion.
*/ */
if (card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
ignore_crc = false; ignore_crc = false;
/* Must check status to be sure of no errors. */ /* Must check status to be sure of no errors. */
@ -460,9 +458,9 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
if (err) if (err)
return err; return err;
} }
if (card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
break; break;
if (mmc_host_is_spi(card->host)) if (mmc_host_is_spi(host))
break; break;
/* /*
@ -478,18 +476,18 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
/* Timeout if the device never leaves the program state. */ /* Timeout if the device never leaves the program state. */
if (time_after(jiffies, timeout)) { if (time_after(jiffies, timeout)) {
pr_err("%s: Card stuck in programming state! %s\n", pr_err("%s: Card stuck in programming state! %s\n",
mmc_hostname(card->host), __func__); mmc_hostname(host), __func__);
return -ETIMEDOUT; return -ETIMEDOUT;
} }
} while (R1_CURRENT_STATE(status) == R1_STATE_PRG); } while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
if (mmc_host_is_spi(card->host)) { if (mmc_host_is_spi(host)) {
if (status & R1_SPI_ILLEGAL_COMMAND) if (status & R1_SPI_ILLEGAL_COMMAND)
return -EBADMSG; return -EBADMSG;
} else { } else {
if (status & 0xFDFFA000) if (status & 0xFDFFA000)
pr_warning("%s: unexpected status %#x after " pr_warn("%s: unexpected status %#x after switch\n",
"switch", mmc_hostname(card->host), status); mmc_hostname(host), status);
if (status & R1_SWITCH_ERROR) if (status & R1_SWITCH_ERROR)
return -EBADMSG; return -EBADMSG;
} }