mmc: msm_sdcc: Fix possible circular locking dependency warning
In the context of request processing thread, data mover lock is
acquired after the host lock. In another context, in the completion
handler of data mover the locks are acquired in the reverse order,
resulting in possible circular lock dependency warning. Hence,
schedule a tasklet to process the dma completion so as to avoid
nested locks.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
diff --git a/drivers/mmc/host/msm_sdcc.h b/drivers/mmc/host/msm_sdcc.h
index ff2b0f7..996990d 100644
--- a/drivers/mmc/host/msm_sdcc.h
+++ b/drivers/mmc/host/msm_sdcc.h
@@ -172,6 +172,8 @@
struct msmsdcc_host *host;
int busy; /* Set if DM is busy */
int active;
+ unsigned int result;
+ struct msm_dmov_errdata err;
};
struct msmsdcc_pio_data {
@@ -235,6 +237,7 @@
int cmdpoll;
struct msmsdcc_stats stats;
+ struct tasklet_struct dma_tlet;
/* Command parameters */
unsigned int cmd_timeout;
unsigned int cmd_pio_irqmask;