xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

misc: mic: bug fix for interrupt acknowledgement in MSI/INTx case.

Browse Source 
The interrupt handler (mic_interrupt), called in the MSI/INTx mode,
writes to the interrupt sources register to acknowledge the
interrupt and then calls the corresponding callback handlers to handle
the same. These callback handlers acknowledge the interrupts again
leading to missed interrupts. This patch fixes the issue by removing
the interrupt acknowlegment code from the callback handlers.

Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Siva Krishna Kumar Reddy Yerramreddy <siva.krishna.kumar.reddy.yerramreddy@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Cc: stable <stable@vger.kernel.org> # 3.13
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dasaratharaman Chandramouli
2013-12-10 09:51:12 -08:00
committed by Greg Kroah-Hartman
parent d6a484520c
commit df5e4e8b57
4 changed files with 25 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/misc/mic/host/mic_main.c
View File

@@ -115,7 +115,7 @@ static irqreturn_t mic_shutdown_db(int irq, void *data)
struct mic_device *mdev = data;
struct mic_bootparam *bootparam = mdev->dp;
mdev->ops->ack_interrupt(mdev);
mdev->ops->intr_workarounds(mdev);
switch (bootparam->shutdown_status) {
case MIC_HALTED: