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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-07-25 14:57:21 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-07-25 16:04:53 +1000 |
| commit | 375cac70100b58ce8f4737ec530bfbdcb3086964 (patch) | |
| tree | 559c8ceebf73cb7a91a2ec84a7d67c6d242c6ca2 /drivers/fsi | |
| parent | d0cff240b83babe72f5ba28044268b86aaa91d53 (diff) | |
| download | linux-375cac70100b58ce8f4737ec530bfbdcb3086964.tar.gz linux-375cac70100b58ce8f4737ec530bfbdcb3086964.tar.bz2 linux-375cac70100b58ce8f4737ec530bfbdcb3086964.zip | |
fsi: master-ast-cf: Mask unused bits in RTAG/RCRC
Then reading the RTAG/RCRC "registers" from the coprocessor after
a command is complete, mask out the top bits, only keep the relevant
bits. Microcode v5 will leave garbage in those top bits as a
result of a performance optimization.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
Diffstat (limited to 'drivers/fsi')
| -rw-r--r-- | drivers/fsi/fsi-master-ast-cf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/fsi/fsi-master-ast-cf.c b/drivers/fsi/fsi-master-ast-cf.c index c4a35579bfdc..b59abcf3ee32 100644 --- a/drivers/fsi/fsi-master-ast-cf.c +++ b/drivers/fsi/fsi-master-ast-cf.c @@ -377,8 +377,8 @@ static int send_request(struct fsi_master_acf *master, struct fsi_msg *cmd, static int read_copro_response(struct fsi_master_acf *master, uint8_t size, uint32_t *response, u8 *tag) { - uint8_t rtag = ioread8(master->sram + STAT_RTAG); - uint8_t rcrc = ioread8(master->sram + STAT_RCRC); + uint8_t rtag = ioread8(master->sram + STAT_RTAG) & 0xf; + uint8_t rcrc = ioread8(master->sram + STAT_RCRC) & 0xf; uint32_t rdata = 0; uint32_t crc; uint8_t ack; |