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author | Jean Delvare <jdelvare@suse.de> | 2020-09-08 17:22:33 +0200 |
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committer | Jean Delvare <jdelvare@suse.de> | 2020-09-08 17:22:33 +0200 |
commit | a235aabbffbe92553116c1e48da9225d12096afc (patch) | |
tree | 4c1c3efd537bd3c71bc75b4eaaa1e66b6f1224dd | |
parent | 34806fc4e7090b34e32fa1110d546ab5ce01a6a0 (diff) | |
download | i2c-tools-a235aabbffbe92553116c1e48da9225d12096afc.tar.gz |
i2cset: Fix short writes with mask
Short writes used "daddress" for the value, but the masking code did
not expect that, and instead applied the mask to a variable that was
never used.
So change short writes to use "value" for the value, as all other
commands do. Adjust all code paths accordingly.
Reported by David Jedynak.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
-rw-r--r-- | tools/i2cset.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/tools/i2cset.c b/tools/i2cset.c index f0430f2..4a3f597 100644 --- a/tools/i2cset.c +++ b/tools/i2cset.c @@ -125,11 +125,11 @@ static int confirm(const char *filename, int address, int size, int daddress, } fprintf(stderr, "I will write to device file %s, chip address " - "0x%02x, data address\n0x%02x, ", filename, address, daddress); - if (size == I2C_SMBUS_BYTE) - fprintf(stderr, "no data.\n"); - else if (size == I2C_SMBUS_BLOCK_DATA || - size == I2C_SMBUS_I2C_BLOCK_DATA) { + "0x%02x,\n", filename, address); + if (size != I2C_SMBUS_BYTE) + fprintf(stderr, "data address 0x%02x, ", daddress); + if (size == I2C_SMBUS_BLOCK_DATA || + size == I2C_SMBUS_I2C_BLOCK_DATA) { int i; fprintf(stderr, "data"); @@ -140,7 +140,7 @@ static int confirm(const char *filename, int address, int size, int daddress, } else fprintf(stderr, "data 0x%02x%s, mode %s.\n", value, vmask ? " (masked)" : "", - size == I2C_SMBUS_BYTE_DATA ? "byte" : "word"); + size == I2C_SMBUS_WORD_DATA ? "word" : "byte"); if (pec) fprintf(stderr, "PEC checking enabled.\n"); @@ -264,6 +264,10 @@ int main(int argc, char *argv[]) /* read values from command line */ switch (size) { + case I2C_SMBUS_BYTE: + /* short write: data address was not really data address */ + value = daddress; + break; case I2C_SMBUS_BYTE_DATA: case I2C_SMBUS_WORD_DATA: value = strtol(argv[flags+4], &end, 0); @@ -344,12 +348,10 @@ int main(int argc, char *argv[]) if (!yes) { fprintf(stderr, "Old value 0x%0*x, write mask " - "0x%0*x: Will write 0x%0*x to register " - "0x%02x\n", + "0x%0*x, will write 0x%0*x\n", size == I2C_SMBUS_WORD_DATA ? 4 : 2, oldvalue, size == I2C_SMBUS_WORD_DATA ? 4 : 2, vmask, - size == I2C_SMBUS_WORD_DATA ? 4 : 2, value, - daddress); + size == I2C_SMBUS_WORD_DATA ? 4 : 2, value); fprintf(stderr, "Continue? [Y/n] "); fflush(stderr); @@ -369,7 +371,7 @@ int main(int argc, char *argv[]) switch (size) { case I2C_SMBUS_BYTE: - res = i2c_smbus_write_byte(file, daddress); + res = i2c_smbus_write_byte(file, value); break; case I2C_SMBUS_WORD_DATA: res = i2c_smbus_write_word_data(file, daddress, value); @@ -407,7 +409,6 @@ int main(int argc, char *argv[]) switch (size) { case I2C_SMBUS_BYTE: res = i2c_smbus_read_byte(file); - value = daddress; break; case I2C_SMBUS_WORD_DATA: res = i2c_smbus_read_word_data(file, daddress); |