| commit | 186417e98f654632ab6fee35e3663cd396325360 | |
| author | Mischa Jonker <mjonker@synopsys.com> | |
| Fri, 30 Aug 2013 09:56:25 +0000 (30 11:56 +0200) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Fri, 18 Oct 2013 17:54:55 +0000 (18 10:54 -0700) | ||
| tree | 0f89b1f7700dd612e1b4ea7820f71f4609db2015 | treesnapshot (tar.gz zip) |
| parent | 09e39ab45cf8f9affdbab2837a0db34f76f55723 | commitdiff |
ARC: Fix __udelay calculation
commit 7efd0da2d17360e1cef91507dbe619db0ee2c691 upstream.
Cast usecs to u64, to ensure that the (usecs * 4295 * HZ)
multiplication is 64 bit.
Initially, the (usecs * 4295 * HZ) part was done as a 32 bit
multiplication, with the result casted to 64 bit. This led to some bits
falling off, causing a "DMA initialization error" in the stmmac Ethernet
driver, due to a premature timeout.
Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7efd0da2d17360e1cef91507dbe619db0ee2c691 upstream.
Cast usecs to u64, to ensure that the (usecs * 4295 * HZ)
multiplication is 64 bit.
Initially, the (usecs * 4295 * HZ) part was done as a 32 bit
multiplication, with the result casted to 64 bit. This led to some bits
falling off, causing a "DMA initialization error" in the stmmac Ethernet
driver, due to a premature timeout.
Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| arch/arc/include/asm/delay.h | diffblobblamehistory |