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Subject[PATCH v3 19/40] fsi: aspeed: Only read result register for successful read
Date
No reason to read the result in the error path, and remove the
null pointer check on the output, as it should never be null.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
---
drivers/fsi/fsi-master-aspeed.c | 29 +++++++++++++----------------
1 file changed, 13 insertions(+), 16 deletions(-)

diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
index f840c7c4a56b9..10ca23cf58c2e 100644
--- a/drivers/fsi/fsi-master-aspeed.c
+++ b/drivers/fsi/fsi-master-aspeed.c
@@ -181,8 +181,6 @@ static int __opb_read(struct fsi_master_aspeed *aspeed, uint32_t addr,
writel(OPB0_XFER_ACK_EN, base + OPB_IRQ_STATUS);
status = readl(base + OPB0_STATUS);

- result = readl(base + OPB0_FSI_DATA_R);
-
/* Return error when poll timed out */
if (ret) {
trace_fsi_master_aspeed_timeout(reg, status, true);
@@ -193,21 +191,20 @@ static int __opb_read(struct fsi_master_aspeed *aspeed, uint32_t addr,
if (status & STATUS_ERR_ACK)
return -EIO;

- if (out) {
- switch (transfer_size) {
- case XFER_BYTE:
- *(u8 *)out = result;
- break;
- case XFER_HALFWORD:
- *(u16 *)out = result;
- break;
- case XFER_FULLWORD:
- *(u32 *)out = result;
- break;
- default:
- return -EINVAL;
- }
+ result = readl(base + OPB0_FSI_DATA_R);

+ switch (transfer_size) {
+ case XFER_BYTE:
+ *(u8 *)out = result;
+ break;
+ case XFER_HALFWORD:
+ *(u16 *)out = result;
+ break;
+ case XFER_FULLWORD:
+ *(u32 *)out = result;
+ break;
+ default:
+ return -EINVAL;
}

trace_fsi_master_aspeed_opb_xfer(addr, transfer_size + 1, result, true);
--
2.39.3

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