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Mon, 13 Nov 2023 05:12:03 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1782454554347564334 X-GMAIL-MSGID: 1782454554347564334 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: 82d149b86d31 ("dmaengine: fsl-edma: add PM suspend/resume support") Signed-off-by: Xiaolei Wang --- drivers/dma/fsl-edma-main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c index 52577fffc62b..aea7a703dda7 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; }