linux, branch v3.4.1

Linux 3.4.1

2012-06-01T07:18:44Z

i2c: tegra: notify transfer-complete after clearing status.

2012-06-01T07:18:28Z

commit c889e91d2cc22123f20f40dde0c0a91856a20eea upstream. The notification of the transfer complete by calling complete() should be done after clearing all interrupt status. This avoids the race condition of misconfigure the i2c controller in multi-core environment. Signed-off-by: Laxman Dewangan Acked-by: Stephen Warren Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman

i2c: davinci: Free requested IRQ in remove

2012-06-01T07:18:28Z

commit 9868a060ccf769c08ec378a9829137e272e9a92c upstream. The freed IRQ is not necessary the one requested in probe. Even if it was, with two or more i2c-controllers it will fails anyway. Signed-off-by: Marcus Folkesson Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman

MCE: Fix vm86 handling for 32bit mce handler

2012-06-01T07:18:28Z

commit a129a7c84582629741e5fa6f40026efcd7a65bd4 upstream. When running on 32bit the mce handler could misinterpret vm86 mode as ring 0. This can affect whether it does recovery or not; it was possible to panic when recovery was actually possible. Fix this by always forcing vm86 to look like ring 3. Signed-off-by: Andi Kleen Signed-off-by: Tony Luck Signed-off-by: Greg Kroah-Hartman

ARM: dt: tegra cardhu: fix typo in SDHCI node name

2012-06-01T07:18:28Z

commit 1dfebb426cfd16e2080f8c95e00ca2462f2325d4 upstream. Cardhu's eMMC controller is on sdhci@78000600, not sdhci@78000400. Fix the typo. This roughly doubles the IO performance, since the support-8bit property actually takes effect. Signed-off-by: Stephen Warren Signed-off-by: Greg Kroah-Hartman

ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held

2012-06-01T07:18:28Z

commit 435a7ef52db7d86e67a009b36cac1457f8972391 upstream. We can't be holding the mmap_sem while calling flush_cache_user_range because the flush can fault. If we fault on a user address, the page fault handler will try to take mmap_sem again. Since both places acquire the read lock, most of the time it succeeds. However, if another thread tries to acquire the write lock on the mmap_sem (e.g. mmap) in between the call to flush_cache_user_range and the fault, the down_read in do_page_fault will deadlock. [will: removed drop of vma parameter as already queued by rmk (7365/1)] Acked-by: Catalin Marinas Signed-off-by: Dima Zavin Signed-off-by: John Stultz Signed-off-by: Will Deacon Signed-off-by: Russell King Signed-off-by: Greg Kroah-Hartman

ARM: 7365/1: drop unused parameter from flush_cache_user_range

2012-06-01T07:18:28Z

commit 4542b6a0fa6b48d9ae6b41c1efeb618b7a221b2a upstream. vma isn't used and flush_cache_user_range isn't a standard macro that is used on several archs with the same prototype. In fact only unicore32 has a macro with the same name (with an identical implementation and no in-tree users). This is a part of a patch proposed by Dima Zavin (with Message-id: 1272439931-12795-1-git-send-email-dima@android.com) that didn't get accepted. Cc: Dima Zavin Acked-by: Catalin Marinas Signed-off-by: Uwe Kleine-König Signed-off-by: Russell King Cc: Will Deacon Signed-off-by: Greg Kroah-Hartman

iommu: Fix off by one in dmar_get_fault_reason()

2012-06-01T07:18:27Z

commit fefe1ed1398b81e3fadc92d11d91162d343c8836 upstream. fault_reason - 0x20 == ARRAY_SIZE(irq_remap_fault_reasons) is one past the end of the array. Signed-off-by: Dan Carpenter Cc: Joerg Roedel Cc: Youquan Song Cc: walter harms Cc: Suresh Siddha Link: http://lkml.kernel.org/r/20120513170938.GA4280@elgon.mountain Signed-off-by: Ingo Molnar [bwh: Backported to 3.2: s/irq_remap_fault_reasons/intr_remap_fault_reasons/] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

intel-iommu: Add device info into list before doing context mapping

2012-06-01T07:18:27Z

commit e2ad23d04c1304431ab5176c89b7b476ded2d995 upstream. Add device info into list before doing context mapping, because device info will be used by iommu_enable_dev_iotlb(). Without it, ATS won't get enabled as it should be. ATS, while a dubious decision from a security point of view, can be very important for performance. Signed-off-by: Xudong Hao Signed-off-by: Xiantao Zhang Acked-by: Chris Wright Signed-off-by: David Woodhouse Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman

tile: fix bug where fls(0) was not returning 0

2012-06-01T07:18:27Z

commit 9f1d62bed7f015d11b9164078b7fea433b474114 upstream. This is because __builtin_clz(0) returns 64 for the "undefined" case of 0, since the builtin just does a right-shift 32 and "clz" instruction. So, use the alpha approach of casting to u32 and using __builtin_clzll(). Signed-off-by: Chris Metcalf Signed-off-by: Greg Kroah-Hartman