4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tokunori Ikegami ikegami@allied-telesis.co.jp
commit 79ca484b613041ca223f74b34608bb6f5221724b upstream.
Currently the functions use to check both chip ready and good. But the chip ready is not enough to check the operation status. So change this to check the chip good instead of this. About the retry functions to make sure the error handling remain it.
Signed-off-by: Tokunori Ikegami ikegami@allied-telesis.co.jp Reviewed-by: Joakim Tjernlund Joakim.Tjernlund@infinera.com Cc: Chris Packham chris.packham@alliedtelesis.co.nz Cc: Brian Norris computersforpeace@gmail.com Cc: David Woodhouse dwmw2@infradead.org Cc: Boris Brezillon boris.brezillon@free-electrons.com Cc: Marek Vasut marek.vasut@gmail.com Cc: Richard Weinberger richard@nod.at Cc: Cyrille Pitchen cyrille.pitchen@wedev4u.fr Cc: linux-mtd@lists.infradead.org Cc: stable@vger.kernel.org Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mtd/chips/cfi_cmdset_0002.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-)
--- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -2292,12 +2292,13 @@ static int __xipram do_erase_chip(struct chip->erase_suspended = 0; }
- if (chip_ready(map, adr)) + if (chip_good(map, adr, map_word_ff(map))) break;
if (time_after(jiffies, timeo)) { printk(KERN_WARNING "MTD %s(): software timeout\n", __func__ ); + ret = -EIO; break; }
@@ -2305,15 +2306,15 @@ static int __xipram do_erase_chip(struct UDELAY(map, chip, adr, 1000000/HZ); } /* Did we succeed? */ - if (!chip_good(map, adr, map_word_ff(map))) { + if (ret) { /* reset on all failures. */ map_write( map, CMD(0xF0), chip->start ); /* FIXME - should have reset delay before continuing */
- if (++retry_cnt <= MAX_RETRIES) + if (++retry_cnt <= MAX_RETRIES) { + ret = 0; goto retry; - - ret = -EIO; + } }
chip->state = FL_READY; @@ -2387,7 +2388,7 @@ static int __xipram do_erase_oneblock(st chip->erase_suspended = 0; }
- if (chip_ready(map, adr)) { + if (chip_good(map, adr, map_word_ff(map))) { xip_enable(map, chip, adr); break; } @@ -2396,6 +2397,7 @@ static int __xipram do_erase_oneblock(st xip_enable(map, chip, adr); printk(KERN_WARNING "MTD %s(): software timeout\n", __func__ ); + ret = -EIO; break; }
@@ -2403,15 +2405,15 @@ static int __xipram do_erase_oneblock(st UDELAY(map, chip, adr, 1000000/HZ); } /* Did we succeed? */ - if (!chip_good(map, adr, map_word_ff(map))) { + if (ret) { /* reset on all failures. */ map_write( map, CMD(0xF0), chip->start ); /* FIXME - should have reset delay before continuing */
- if (++retry_cnt <= MAX_RETRIES) + if (++retry_cnt <= MAX_RETRIES) { + ret = 0; goto retry; - - ret = -EIO; + } }
chip->state = FL_READY;