From 6f13fd57cd84c06cea6c4b6d61517a4350820a9f Mon Sep 17 00:00:00 2001 From: Andrew Vasquez Date: Thu, 17 Jan 2008 09:02:10 -0800 Subject: [PATCH] [SCSI] qla2xxx: Wait for FLASH write-protection to complete after a write. Some flash parts have a slow enable write-protection (WP) operation whereby subsequent FLASH accesses would fail if the WP operation had not completed. Software now polls the SPI's status-register for WP completion. Signed-off-by: Andrew Vasquez Signed-off-by: James Bottomley --- drivers/scsi/qla2xxx/qla_sup.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c index ad2fa01bd233..af16c55b47a7 100644 --- a/drivers/scsi/qla2xxx/qla_sup.c +++ b/drivers/scsi/qla2xxx/qla_sup.c @@ -550,7 +550,7 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr, int ret; uint32_t liter, miter; uint32_t sec_mask, rest_addr, conf_addr; - uint32_t fdata, findex ; + uint32_t fdata, findex, cnt; uint8_t man_id, flash_id; struct device_reg_24xx __iomem *reg = &ha->iobase->isp24; dma_addr_t optrom_dma; @@ -690,8 +690,14 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr, 0xff0000) | ((fdata >> 16) & 0xff)); } - /* Enable flash write-protection. */ + /* Enable flash write-protection and wait for completion. */ qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0x9c); + for (cnt = 300; cnt && + qla24xx_read_flash_dword(ha, + flash_conf_to_access_addr(0x005)) & BIT_0; + cnt--) { + udelay(10); + } /* Disable flash write. */ WRT_REG_DWORD(®->ctrl_status, -- 2.20.1