diff mbox

[v2,14/26] mmc: panic write: bypass bus ref locking

Message ID 1352379984-18381-15-git-send-email-dragos.tatulea@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

dragos.tatulea@intel.com Nov. 8, 2012, 1:06 p.m. UTC 
From: Adrian Hunter <adrian.hunter@intel.com>

We want to avoid it while panic dumping.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
---
 drivers/mmc/core/core.c |   10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox

Patch

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 4fd7061..3daec19 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1418,6 +1418,11 @@  static inline void mmc_bus_get(struct mmc_host *host)
 {
 	unsigned long flags;
 
+	if (mmc_am_panic_task(host)) {
+		host->bus_refs++;
+		return;
+	}
+
 	spin_lock_irqsave(&host->lock, flags);
 	host->bus_refs++;
 	spin_unlock_irqrestore(&host->lock, flags);
@@ -1431,6 +1436,11 @@  static inline void mmc_bus_put(struct mmc_host *host)
 {
 	unsigned long flags;
 
+	if (mmc_am_panic_task(host)) {
+		host->bus_refs--;
+		return;
+	}
+
 	spin_lock_irqsave(&host->lock, flags);
 	host->bus_refs--;
 	if ((host->bus_refs == 0) && host->bus_ops)