diff options
| author | Xiaolei Wang <xiaolei.wang@windriver.com> | 2023-11-14 06:57:13 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-11-24 18:21:25 +0530 |
| commit | 3448397a47c08c291c3fccb7ac5f0f429fd547e0 (patch) | |
| tree | 709fe9f94fd9a3d5e1bae4d5500256bead91ab2b /drivers/dma | |
| parent | 2838a897654c4810153cc51646414ffa54fd23b0 (diff) | |
| download | linux-3448397a47c08c291c3fccb7ac5f0f429fd547e0.tar.gz | |
dmaengine: fsl-edma: Add judgment on enabling round robin arbitration
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@windriver.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20231113225713.1892643-3-xiaolei.wang@windriver.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/fsl-edma-main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c index 52577fffc62b2..aea7a703dda7e 100644 --- a/drivers/dma/fsl-edma-main.c +++ b/drivers/dma/fsl-edma-main.c @@ -665,7 +665,8 @@ 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; } |