mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 23:46:41 +07:00
a6a66f80c8
The current Cadence QSPI driver caused a kernel panic sporadically when writing to QSPI. The problem was caused by writing more bytes than needed because the QSPI operated on 4 bytes at a time. <snip> [ 11.202044] Unable to handle kernel paging request at virtual address bffd3000 [ 11.209254] pgd = e463054d [ 11.211948] [bffd3000] *pgd=2fffb811, *pte=00000000, *ppte=00000000 [ 11.218202] Internal error: Oops: 7 [#1] SMP ARM [ 11.222797] Modules linked in: [ 11.225844] CPU: 1 PID: 1317 Comm: systemd-hwdb Not tainted 4.17.7-d0c45cd44a8f [ 11.235796] Hardware name: Altera SOCFPGA Arria10 [ 11.240487] PC is at __raw_writesl+0x70/0xd4 [ 11.244741] LR is at cqspi_write+0x1a0/0x2cc </snip> On a page boundary limit the number of bytes copied from the tx buffer to remain within the page. This patch uses a temporary buffer to hold the 4 bytes to write and then copies only the bytes required from the tx buffer. Reported-by: Adrian Amborzewicz <adrian.ambrozewicz@intel.com> Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> |
||
|---|---|---|
| .. | ||
| aspeed-smc.c | ||
| atmel-quadspi.c | ||
| cadence-quadspi.c | ||
| fsl-quadspi.c | ||
| hisi-sfc.c | ||
| intel-spi-pci.c | ||
| intel-spi-platform.c | ||
| intel-spi.c | ||
| intel-spi.h | ||
| Kconfig | ||
| Makefile | ||
| mtk-quadspi.c | ||
| nxp-spifi.c | ||
| spi-nor.c | ||
| stm32-quadspi.c | ||