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wlcore: Allow memory access when the FW crashes 

When the no_recovery flag is used, the recovery work will not restart
the FW and the state will not be set to 'on'. To enable post-mortem
analysis, allow memory access in the 'restarting' state.

Also, since the FW might not be operational, don't fail the read/write
operations if elp_wakeup fails.

Reported-by: Arkady Miasnikov <a-miasnikov@ti.com>
Signed-off-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Luciano Coelho <luca@coelho.fi>
This commit is contained in:
Ido Yariv 2012-08-21 17:17:13 +03:00 committed by Luciano Coelho
parent 001e39a8ef
commit d556023895
1 changed files with 12 additions and 8 deletions
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20
drivers/net/wireless/ti/wlcore/debugfs.c
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@ -1064,14 +1064,16 @@ static ssize_t dev_mem_read(struct file *file,
mutex_lock(&wl->mutex);
if (unlikely(wl->state != WLCORE_STATE_ON)) {
if (unlikely(wl->state == WLCORE_STATE_OFF)) {
ret = -EFAULT;
goto skip_read;
}
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto skip_read;
/*
* Don't fail if elp_wakeup returns an error, so the device's memory
* could be read even if the FW crashed
*/
wl1271_ps_elp_wakeup(wl);
/* store current partition and switch partition */
memcpy(&old_part, &wl->curr_part, sizeof(old_part));
@ -1149,14 +1151,16 @@ static ssize_t dev_mem_write(struct file *file, const char __user *user_buf,
mutex_lock(&wl->mutex);
if (unlikely(wl->state != WLCORE_STATE_ON)) {
if (unlikely(wl->state == WLCORE_STATE_OFF)) {
ret = -EFAULT;
goto skip_write;
}
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto skip_write;
/*
* Don't fail if elp_wakeup returns an error, so the device's memory
* could be read even if the FW crashed
*/
wl1271_ps_elp_wakeup(wl);
/* store current partition and switch partition */
memcpy(&old_part, &wl->curr_part, sizeof(old_part));