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x86: tangier: Fix off-by-one error when preparing CSRT
authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Thu, 29 Aug 2019 14:04:20 +0000 (17:04 +0300)
committerBin Meng <bmeng.cn@gmail.com>
Tue, 10 Sep 2019 08:19:03 +0000 (16:19 +0800)
commit980fe1ab2ad6a449639928d7a7e9c0aadb41a495
treeba95f22ec3aaf6a44cdef8e8c011ec8da1340d48tree | snapshot
parent0c6352ec2a238c1f89b0f394b34da57ab0849f6acommit | diff
x86: tangier: Fix off-by-one error when preparing CSRT

Intel iDMA 32-bit controller has 17 bits for the maximum block size value.
Due to nature of the binary number representation the maximum value is
2^17 - 1. The original code misses the latter part in equation.

Fixes: 5e99fde34a77 ("x86: tangier: Populate CSRT for shared DMA controller")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
arch/x86/cpu/tangier/acpi.c diff | blob | history
Domain: System / Kernel;