Hi Peter, [auto build test WARNING on v4.3-rc4 -- if it's inappropriate base, please ignore]
config: arm-at91_dt_defconfig (attached as .config)
reproduce:
wget
https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
-O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm
All warnings (new ones prefixed by >>):
drivers/i2c/busses/i2c-at91.c: In function 'at91_twi_read_data_dma_callback':
>> drivers/i2c/busses/i2c-at91.c:378:11: warning: unused variable 'ier'
>> [-Wunused-variable]
unsigned ier = AT91_TWI_TXCOMP;
^
vim +/ier +378 drivers/i2c/busses/i2c-at91.c
75b81f33 Marek Roszko 2014-08-20 362 dev->buf_len =
1;
75b81f33 Marek Roszko 2014-08-20 363 }
fac368a0 Nikolaus Voss 2011-11-08 364 }
fac368a0 Nikolaus Voss 2011-11-08 365
fac368a0 Nikolaus Voss 2011-11-08 366 /* send stop if second but last
byte has been read */
0ef6f321 Cyrille Pitchen 2015-06-09 367 if (!dev->pdata->has_alt_cmd &&
dev->buf_len == 1)
fac368a0 Nikolaus Voss 2011-11-08 368 at91_twi_write(dev,
AT91_TWI_CR, AT91_TWI_STOP);
fac368a0 Nikolaus Voss 2011-11-08 369
fac368a0 Nikolaus Voss 2011-11-08 370 dev_dbg(dev->dev, "read 0x%x,
to go %d\n", *dev->buf, dev->buf_len);
fac368a0 Nikolaus Voss 2011-11-08 371
fac368a0 Nikolaus Voss 2011-11-08 372 ++dev->buf;
fac368a0 Nikolaus Voss 2011-11-08 373 }
fac368a0 Nikolaus Voss 2011-11-08 374
60937b2c Ludovic Desroches 2012-11-23 375 static void
at91_twi_read_data_dma_callback(void *data)
60937b2c Ludovic Desroches 2012-11-23 376 {
60937b2c Ludovic Desroches 2012-11-23 377 struct at91_twi_dev *dev =
(struct at91_twi_dev *)data;
0ef6f321 Cyrille Pitchen 2015-06-09 @378 unsigned ier = AT91_TWI_TXCOMP;
60937b2c Ludovic Desroches 2012-11-23 379
5e3cfc6c Cyrille Pitchen 2015-06-09 380 dma_unmap_single(dev->dev,
sg_dma_address(&dev->dma.sg[0]),
28772ac8 Wolfram Sang 2014-07-21 381 dev->buf_len,
DMA_FROM_DEVICE);
60937b2c Ludovic Desroches 2012-11-23 382
60937b2c Ludovic Desroches 2012-11-23 383 /* The last two bytes have to
be read without using dma */
60937b2c Ludovic Desroches 2012-11-23 384 dev->buf += dev->buf_len - 2;
60937b2c Ludovic Desroches 2012-11-23 385 dev->buf_len = 2;
e0b440c7 Peter Rosin 2015-10-05 386 at91_twi_write(dev,
AT91_TWI_IER, AT91_TWI_RXRDY);
:::::: The code at line 378 was first introduced by commit
:::::: 0ef6f3213dac48bbc71c98b5a2752db556f3e649 i2c: at91: add support for new
alternative command mode
:::::: TO: Cyrille Pitchen <cyrille.pitc...@atmel.com>
:::::: CC: Wolfram Sang <w...@the-dreams.de>
---
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.config.gz
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