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Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

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Pull i2c fixes from Wolfram Sang:
 "The ismt driver had a problem with a rarely used transaction type and
  the designware driver was made even more robust against non standard
  ACPI tables"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: designware: Round down ACPI provided clk to nearest supported clk
  i2c: ismt: Return EMSGSIZE for block reads with bogus length
  i2c: ismt: Don't duplicate the receive length for block reads
This commit is contained in:
Linus Torvalds 2017-09-01 15:03:13 -07:00
commit f8c6d7246a
2 changed files with 16 additions and 6 deletions
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16
drivers/i2c/busses/i2c-designware-platdrv.c
View File

@ -256,7 +256,8 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
struct dw_i2c_dev *dev;
u32 acpi_speed, ht = 0;
struct resource *mem;
int irq, ret;
int i, irq, ret;
const int supported_speeds[] = { 0, 100000, 400000, 1000000, 3400000 };
irq = platform_get_irq(pdev, 0);
if (irq < 0)
@ -297,9 +298,16 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
}
acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev);
/* Some broken DSTDs use 1MiHz instead of 1MHz */
if (acpi_speed == 1048576)
acpi_speed = 1000000;
/*
* Some DSTDs use a non standard speed, round down to the lowest
* standard speed.
*/
for (i = 1; i < ARRAY_SIZE(supported_speeds); i++) {
if (acpi_speed < supported_speeds[i])
break;
}
acpi_speed = supported_speeds[i - 1];
/*
* Find bus speed from the "clock-frequency" device property, ACPI
* or by using fast mode if neither is set.

6
drivers/i2c/busses/i2c-ismt.c
View File

@ -341,8 +341,10 @@ static int ismt_process_desc(const struct ismt_desc *desc,
break;
case I2C_SMBUS_BLOCK_DATA:
case I2C_SMBUS_I2C_BLOCK_DATA:
memcpy(&data->block[1], dma_buffer, desc->rxbytes);
data->block[0] = desc->rxbytes;
if (desc->rxbytes != dma_buffer[0] + 1)
return -EMSGSIZE;
memcpy(data->block, dma_buffer, desc->rxbytes);
break;
}
return 0;