From: Tudor Ambarus <tudor.ambarus@microchip.com>
To: <tkuw584924@gmail.com>, <p.yadav@ti.com>, <michael@walle.cc>
Cc: <miquel.raynal@bootlin.com>, <richard@nod.at>,
<Bacem.Daassi@infineon.com>, <Takahiro.Kuwano@infineon.com>,
<linux-mtd@lists.infradead.org>,
Tudor Ambarus <tudor.ambarus@microchip.com>
Subject: [PATCH v14 3/8] mtd: spi-nor: sfdp: Clarify that nor->read_{opcode, dummy} are uninitialized
Date: Tue, 3 May 2022 11:16:22 +0300 [thread overview]
Message-ID: <20220503081627.341870-4-tudor.ambarus@microchip.com> (raw)
In-Reply-To: <20220503081627.341870-1-tudor.ambarus@microchip.com>
nor->read_{opcode, dummy} are uninitialized (value zero) at SFDP parsing
time. Clarify that in the code.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
drivers/mtd/spi-nor/sfdp.c | 18 ++++++++----------
1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c
index 61ae8c8c5237..058ce218d2af 100644
--- a/drivers/mtd/spi-nor/sfdp.c
+++ b/drivers/mtd/spi-nor/sfdp.c
@@ -178,12 +178,10 @@ static int spi_nor_read_raw(struct spi_nor *nor, u32 addr, size_t len, u8 *buf)
static int spi_nor_read_sfdp(struct spi_nor *nor, u32 addr,
size_t len, void *buf)
{
- u8 addr_nbytes, read_opcode, read_dummy;
+ u8 addr_nbytes;
int ret;
- read_opcode = nor->read_opcode;
addr_nbytes = nor->addr_nbytes;
- read_dummy = nor->read_dummy;
nor->read_opcode = SPINOR_OP_RDSFDP;
nor->addr_nbytes = 3;
@@ -191,9 +189,10 @@ static int spi_nor_read_sfdp(struct spi_nor *nor, u32 addr,
ret = spi_nor_read_raw(nor, addr, len, buf);
- nor->read_opcode = read_opcode;
nor->addr_nbytes = addr_nbytes;
- nor->read_dummy = read_dummy;
+ /* Restore setup to its uninitialized state. */
+ nor->read_opcode = 0;
+ nor->read_dummy = 0;
return ret;
}
@@ -690,7 +689,7 @@ static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt,
u32 addr;
int err;
u8 i;
- u8 addr_nbytes, read_opcode, read_dummy;
+ u8 addr_nbytes;
u8 read_data_mask, map_id;
/* Use a kmalloc'ed bounce buffer to guarantee it is DMA-able. */
@@ -699,8 +698,6 @@ static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt,
return ERR_PTR(-ENOMEM);
addr_nbytes = nor->addr_nbytes;
- read_dummy = nor->read_dummy;
- read_opcode = nor->read_opcode;
map_id = 0;
/* Determine if there are any optional Detection Command Descriptors */
@@ -757,8 +754,9 @@ static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt,
out:
kfree(buf);
nor->addr_nbytes = addr_nbytes;
- nor->read_dummy = read_dummy;
- nor->read_opcode = read_opcode;
+ /* Restore setup to its uninitialized state. */
+ nor->read_dummy = 0;
+ nor->read_opcode = 0;
return ret;
}
--
2.25.1
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next prev parent reply other threads:[~2022-05-03 8:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-03 8:16 [PATCH v14 0/8] mtd: spi-nor: Add support for Infineon s25hl-t/s25hs-t Tudor Ambarus
2022-05-03 8:16 ` [PATCH v14 1/8] mtd: spi-nor: s/addr_width/addr_nbytes Tudor Ambarus
2022-05-03 8:16 ` [PATCH v14 2/8] mtd: spi-nor: core: Shrink the storage size of the flash_info's addr_nbytes Tudor Ambarus
2022-05-03 8:27 ` Tudor.Ambarus
2022-05-03 8:35 ` Tudor.Ambarus
2022-05-03 8:16 ` Tudor Ambarus [this message]
2022-05-03 8:16 ` [PATCH v14 4/8] mtd: spi-nor: Do not change nor->addr_nbytes at SFDP parsing time Tudor Ambarus
2022-05-03 8:16 ` [PATCH v14 5/8] mtd: spi-nor: core: Couple the number of address bytes with the address mode Tudor Ambarus
2022-05-03 8:16 ` [PATCH v14 6/8] mtd: spi-nor: Retain nor->addr_width at 4BAIT parse Tudor Ambarus
2022-05-03 8:16 ` [PATCH v14 7/8] mtd: spi-nor: spansion: Add local function to discover page size Tudor Ambarus
2022-05-03 8:16 ` [PATCH v14 8/8] mtd: spi-nor: spansion: Add s25hl-t/s25hs-t IDs and fixups Tudor Ambarus
2022-05-04 7:38 ` Takahiro Kuwano
2022-05-04 7:47 ` Tudor.Ambarus
2022-05-04 7:59 ` Takahiro Kuwano
2022-05-04 7:56 ` [PATCH v14 0/8] mtd: spi-nor: Add support for Infineon s25hl-t/s25hs-t Takahiro Kuwano
2022-05-04 9:55 ` Tudor.Ambarus
2022-05-09 2:37 ` Takahiro Kuwano
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