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Groups > linux.kernel > #1730235 > unrolled thread
| Started by | Bin Meng <bmeng.cn@gmail.com> |
|---|---|
| First post | 2017-09-11 11:40 +0200 |
| Last post | 2017-09-11 11:40 +0200 |
| Articles | 1 — 1 participant |
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[PATCH v2 03/10] spi-nor: intel-spi: Fix broken software sequencing codes Bin Meng <bmeng.cn@gmail.com> - 2017-09-11 11:40 +0200
| From | Bin Meng <bmeng.cn@gmail.com> |
|---|---|
| Date | 2017-09-11 11:40 +0200 |
| Subject | [PATCH v2 03/10] spi-nor: intel-spi: Fix broken software sequencing codes |
| Message-ID | <uotma-15R-9@gated-at.bofh.it> |
There are two bugs in current intel_spi_sw_cycle(): - The 'data byte count' field should be the number of bytes transferred minus 1 - SSFSTS_CTL is the offset from ispi->sregs, not ispi->base Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Cc: <stable@vger.kernel.org> # v4.11+ Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> --- Changes in v2: - Add stable kernel tags in the commit message drivers/mtd/spi-nor/intel-spi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/spi-nor/intel-spi.c b/drivers/mtd/spi-nor/intel-spi.c index 07626ca..263c6ab 100644 --- a/drivers/mtd/spi-nor/intel-spi.c +++ b/drivers/mtd/spi-nor/intel-spi.c @@ -426,7 +426,7 @@ static int intel_spi_sw_cycle(struct intel_spi *ispi, u8 opcode, int len) if (ret < 0) return ret; - val = (len << SSFSTS_CTL_DBC_SHIFT) | SSFSTS_CTL_DS; + val = ((len - 1) << SSFSTS_CTL_DBC_SHIFT) | SSFSTS_CTL_DS; val |= ret << SSFSTS_CTL_COP_SHIFT; val |= SSFSTS_CTL_FCERR | SSFSTS_CTL_FDONE; val |= SSFSTS_CTL_SCGO; @@ -436,7 +436,7 @@ static int intel_spi_sw_cycle(struct intel_spi *ispi, u8 opcode, int len) if (ret) return ret; - status = readl(ispi->base + SSFSTS_CTL); + status = readl(ispi->sregs + SSFSTS_CTL); if (status & SSFSTS_CTL_FCERR) return -EIO; else if (status & SSFSTS_CTL_AEL) -- 2.9.2
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