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author | Felix Fietkau <nbd@nbd.name> | 2018-04-09 09:55:48 +0200 |
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committer | Felix Fietkau <nbd@nbd.name> | 2018-04-27 15:19:19 +0200 |
commit | 771f1ca3ffe10871893751ab384de3b7a9b06610 (patch) | |
tree | b9b095a1fa53905ed11ac67578d903097ab2ae21 /target/linux/brcm63xx/patches-4.4/000-4.8-08-mtd-spi-nor-simplify-write-loop.patch | |
parent | 1de74df8b9bbaafd147a2380fa306140b79b60d9 (diff) | |
download | upstream-771f1ca3ffe10871893751ab384de3b7a9b06610.tar.gz upstream-771f1ca3ffe10871893751ab384de3b7a9b06610.tar.bz2 upstream-771f1ca3ffe10871893751ab384de3b7a9b06610.zip |
brcm63xx: remove linux 4.4 support
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'target/linux/brcm63xx/patches-4.4/000-4.8-08-mtd-spi-nor-simplify-write-loop.patch')
-rw-r--r-- | target/linux/brcm63xx/patches-4.4/000-4.8-08-mtd-spi-nor-simplify-write-loop.patch | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/target/linux/brcm63xx/patches-4.4/000-4.8-08-mtd-spi-nor-simplify-write-loop.patch b/target/linux/brcm63xx/patches-4.4/000-4.8-08-mtd-spi-nor-simplify-write-loop.patch deleted file mode 100644 index b2e840d488..0000000000 --- a/target/linux/brcm63xx/patches-4.4/000-4.8-08-mtd-spi-nor-simplify-write-loop.patch +++ /dev/null @@ -1,103 +0,0 @@ -From e5d05cbd6d8b01f08c95c427a36c66aac769af4f Mon Sep 17 00:00:00 2001 -From: Michal Suchanek <hramrach@gmail.com> -Date: Thu, 5 May 2016 17:31:54 -0700 -Subject: [PATCH 08/10] mtd: spi-nor: simplify write loop - -The spi-nor write loop assumes that what is passed to the hardware -driver write() is what gets written. - -When write() writes less than page size at once data is dropped on the -floor. Check the amount of data writen and exit if it does not match -requested amount. - -Signed-off-by: Michal Suchanek <hramrach@gmail.com> -Signed-off-by: Brian Norris <computersforpeace@gmail.com> -Tested-by Cyrille Pitchen <cyrille.pitchen@atmel.com> -Acked-by: Michal Suchanek <hramrach@gmail.com> -Tested-by: Michal Suchanek <hramrach@gmail.com> ---- - drivers/mtd/spi-nor/spi-nor.c | 58 +++++++++++++++++++------------------------ - 1 file changed, 25 insertions(+), 33 deletions(-) - ---- a/drivers/mtd/spi-nor/spi-nor.c -+++ b/drivers/mtd/spi-nor/spi-nor.c -@@ -988,8 +988,8 @@ static int spi_nor_write(struct mtd_info - size_t *retlen, const u_char *buf) - { - struct spi_nor *nor = mtd_to_spi_nor(mtd); -- u32 page_offset, page_size, i; -- int ret; -+ size_t page_offset, page_remain, i; -+ ssize_t ret; - - dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len); - -@@ -997,45 +997,37 @@ static int spi_nor_write(struct mtd_info - if (ret) - return ret; - -- write_enable(nor); -+ for (i = 0; i < len; ) { -+ ssize_t written; - -- page_offset = to & (nor->page_size - 1); -- -- /* do all the bytes fit onto one page? */ -- if (page_offset + len <= nor->page_size) { -- ret = nor->write(nor, to, len, buf); -- if (ret < 0) -- goto write_err; -- *retlen += ret; -- } else { -+ page_offset = (to + i) & (nor->page_size - 1); -+ WARN_ONCE(page_offset, -+ "Writing at offset %zu into a NOR page. Writing partial pages may decrease reliability and increase wear of NOR flash.", -+ page_offset); - /* the size of data remaining on the first page */ -- page_size = nor->page_size - page_offset; -- ret = nor->write(nor, to, page_size, buf); -+ page_remain = min_t(size_t, -+ nor->page_size - page_offset, len - i); -+ -+ write_enable(nor); -+ ret = nor->write(nor, to + i, page_remain, buf + i); - if (ret < 0) - goto write_err; -- *retlen += ret; -+ written = ret; - -- /* write everything in nor->page_size chunks */ -- for (i = ret; i < len; ) { -- page_size = len - i; -- if (page_size > nor->page_size) -- page_size = nor->page_size; -- -- ret = spi_nor_wait_till_ready(nor); -- if (ret) -- goto write_err; -- -- write_enable(nor); -- -- ret = nor->write(nor, to + i, page_size, buf + i); -- if (ret < 0) -- goto write_err; -- *retlen += ret; -- i += ret; -+ ret = spi_nor_wait_till_ready(nor); -+ if (ret) -+ goto write_err; -+ *retlen += written; -+ i += written; -+ if (written != page_remain) { -+ dev_err(nor->dev, -+ "While writing %zu bytes written %zd bytes\n", -+ page_remain, written); -+ ret = -EIO; -+ goto write_err; - } - } - -- ret = spi_nor_wait_till_ready(nor); - write_err: - spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE); - return ret; |