diff options
| author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2021-07-01 10:05:34 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-08-24 10:15:31 +0200 |
| commit | 2b8ac062f33781edbefb482c6abebfde6b373eed (patch) | |
| tree | c6b64f3437ffb8d9fb3234567653e2f232c6b30b /drivers/mmc/host/dw_mmc.h | |
| parent | mmc: mmc_spi: Simplify busy loop in mmc_spi_skip() (diff) | |
| download | linux-2b8ac062f33781edbefb482c6abebfde6b373eed.tar.xz linux-2b8ac062f33781edbefb482c6abebfde6b373eed.zip | |
mmc: dw_mmc: Add data CRC error injection
This driver has had problems when handling data errors. Add fault
injection support so that the abort handling can be easily triggered and
regression-tested. A hrtimer is used to indicate a data CRC error at
various points during the data transfer.
Note that for the recent problem with hangs in the case of some data CRC
errors, a udelay(10) inserted at the start of send_stop_abort() greatly
helped in triggering the error, but I've not included this as part of
the fault injection support since it seemed too specific.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20210701080534.23138-1-vincent.whitchurch@axis.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/dw_mmc.h')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index da5923a92e60..ce05d81477d9 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -14,6 +14,8 @@ #include <linux/mmc/core.h> #include <linux/dmaengine.h> #include <linux/reset.h> +#include <linux/fault-inject.h> +#include <linux/hrtimer.h> #include <linux/interrupt.h> enum dw_mci_state { @@ -230,6 +232,11 @@ struct dw_mci { struct timer_list cmd11_timer; struct timer_list cto_timer; struct timer_list dto_timer; + +#ifdef CONFIG_FAULT_INJECTION + struct fault_attr fail_data_crc; + struct hrtimer fault_timer; +#endif }; /* DMA ops for Internal/External DMAC interface */ |