This is a note to let you know that I've just added the patch titled
dmaengine: fsl-edma: Add judgment on enabling round robin arbitration
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dmaengine-fsl-edma-add-judgment-on-enabling-round-ro.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bb363b494c1b803fa9dded96d610b280b51f2a4f
Author: Xiaolei Wang <xiaolei.wang@xxxxxxxxxxxxx>
Date: Tue Nov 14 06:57:13 2023 +0800
dmaengine: fsl-edma: Add judgment on enabling round robin arbitration
[ Upstream commit 3448397a47c08c291c3fccb7ac5f0f429fd547e0 ]
Add judgment on enabling round robin arbitration to avoid
exceptions if this function is not supported.
Call trace:
fsl_edma_resume_early+0x1d4/0x208
dpm_run_callback+0xd4/0x304
device_resume_early+0xb0/0x208
dpm_resume_early+0x224/0x528
suspend_devices_and_enter+0x3e4/0xd00
pm_suspend+0x3c4/0x910
state_store+0x90/0x124
kobj_attr_store+0x48/0x64
sysfs_kf_write+0x84/0xb4
kernfs_fop_write_iter+0x19c/0x264
vfs_write+0x664/0x858
ksys_write+0xc8/0x180
__arm64_sys_write+0x44/0x58
invoke_syscall+0x5c/0x178
el0_svc_common.constprop.0+0x11c/0x14c
do_el0_svc+0x30/0x40
el0_svc+0x58/0xa8
el0t_64_sync_handler+0xc0/0xc4
el0t_64_sync+0x190/0x194
Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support")
Signed-off-by: Xiaolei Wang <xiaolei.wang@xxxxxxxxxxxxx>
Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
Link: https://lore.kernel.org/r/20231113225713.1892643-3-xiaolei.wang@xxxxxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c
index 242a70cf85f4b..db6cd8431f30a 100644
--- a/drivers/dma/fsl-edma-main.c
+++ b/drivers/dma/fsl-edma-main.c
@@ -674,7 +674,8 @@ static int fsl_edma_resume_early(struct device *dev)
fsl_edma_chan_mux(fsl_chan, fsl_chan->slave_id, true);
}
- edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
+ if (!(fsl_edma->drvdata->flags & FSL_EDMA_DRV_SPLIT_REG))
+ edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
return 0;
}
