diff options
| author | Balaji T K <balajitk@ti.com> | 2012-11-19 20:29:55 +0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2012-12-06 22:54:54 +0400 |
| commit | 25e1897bf59b917a696b84b8cf28a5373157404d (patch) | |
| tree | 34b1186e075e071c446c61ac819234c85b53958f /drivers/mmc | |
| parent | ab269128a2cff7abee06f023e6466fc29991738c (diff) | |
| download | linux-25e1897bf59b917a696b84b8cf28a5373157404d.tar.xz | |
mmc: omap_hsmmc: Fix Oops in case of data errors
ae4bf788ee9 ("mmc: omap_hsmmc: consolidate error report handling of HSMMC
IRQ") sets both end_cmd and end_trans to 1.
Setting end_cmd to 1 for Data Timeout/CRC leads to NULL pointer dereference of
host->cmd as the command complete has previously been handled.
Set end_cmd only in case of command Timeout/CRC.
Moreover host->cmd->error should not be updated on data error case, only
host->data->error needs to be updated.
Signed-off-by: Balaji T K <balajitk@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Venkatraman S <svenkatr@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 5434fd8e088a..0fcf792af823 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -969,10 +969,14 @@ static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, __func__); } -static void hsmmc_command_incomplete(struct omap_hsmmc_host *host, int err) +static void hsmmc_command_incomplete(struct omap_hsmmc_host *host, + int err, int end_cmd) { omap_hsmmc_reset_controller_fsm(host, SRC); - host->cmd->error = err; + if (end_cmd) { + if (host->cmd) + host->cmd->error = err; + } if (host->data) { omap_hsmmc_reset_controller_fsm(host, SRD); @@ -991,14 +995,16 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) if (status & ERR) { omap_hsmmc_dbg_report_irq(host, status); + + if (status & (CMD_TIMEOUT | CMD_CRC)) + end_cmd = 1; if (status & (CMD_TIMEOUT | DATA_TIMEOUT)) - hsmmc_command_incomplete(host, -ETIMEDOUT); + hsmmc_command_incomplete(host, -ETIMEDOUT, end_cmd); else if (status & (CMD_CRC | DATA_CRC)) - hsmmc_command_incomplete(host, -EILSEQ); + hsmmc_command_incomplete(host, -EILSEQ, end_cmd); - end_cmd = 1; if (host->data || host->response_busy) { - end_trans = 1; + end_trans = !end_cmd; host->response_busy = 0; } } |