CVE-2026-43415: scsi: ufs: core: Fix SError in ufshcd_rtc_work() during UFS suspend

In the Linux kernel, the following vulnerability has been resolved:

scsi: ufs: core: Fix SError in ufshcdrtcwork() during UFS suspend

In ufshcdwlsuspend(), canceldelayedworksync() is called to cancel the UFS RTC work, but it is placed after ufshcdvopssuspend(hba, pmop, POSTCHANGE). This creates a race condition where ufshcdrtcwork() can still be running while ufshcdvopssuspend() is executing. When UFSHCDCAPCLKGATING is not supported, the condition !hba->clkgating.activereqs is always true, causing ufshcdupdatertc() to be executed. Since ufshcdvopssuspend() typically performs clock gating operations, executing ufshcdupdatertc() at that moment triggers an SError. The kernel panic trace is as follows:

Kernel panic - not syncing: Asynchronous SError Interrupt Call trace: dumpbacktrace+0xec/0x128 showstack+0x18/0x28 dumpstacklvl+0x40/0xa0 dumpstack+0x18/0x24 panic+0x148/0x374 nmipanic+0x3c/0x8c arm64serrorpanic+0x64/0x8c doserror+0xc4/0xc8 el1h64errorhandler+0x34/0x4c el1h64error+0x68/0x6c el1interrupt+0x20/0x58 el1h64irqhandler+0x18/0x24 el1h64irq+0x68/0x6c ktimeget+0xc4/0x12c ufshcdmcqsqstop+0x4c/0xec ufshcdmcqsqcleanup+0x64/0x1dc ufshcdclearcmd+0x38/0x134 ufshcdissuedevcmd+0x298/0x4d0 ufshcdexecdevcmd+0x1a4/0x1c4 ufshcdqueryattr+0xbc/0x19c ufshcdrtcwork+0x10c/0x1c8 processscheduledworks+0x1c4/0x45c workerthread+0x32c/0x3e8 kthread+0x120/0x1d8 retfromfork+0x10/0x20

Fix this by moving canceldelayedworksync() before the call to ufshcdvopssuspend(hba, pmop, PRECHANGE), ensuring the UFS RTC work is fully completed or cancelled at that point.