tree cd2956a98de26db7c16059b8dda692b6a94c3857
parent cf5bb835b7c8a5fee7f26455099cca7feb57f5e9
author Giovanni Cabiddu <giovanni.cabiddu@intel.com> 1662720553 +0100
committer Herbert Xu <herbert@gondor.apana.org.au> 1663324186 +0800

Revert "crypto: qat - reduce size of mapped region"

This reverts commit e48767c17718067ba21fb2ef461779ec2506f845.

In an attempt to resolve a set of warnings reported by the static
analyzer Smatch, the reverted commit improperly reduced the sizes of the
DMA mappings used for the input and output parameters for both RSA and
DH creating a mismatch (map size=8 bytes, unmap size=64 bytes).

This issue is reported when CONFIG_DMA_API_DEBUG is selected, when the
crypto self test is run. The function dma_unmap_single() reports a
warning similar to the one below, saying that the `device driver frees
DMA memory with different size`.

    DMA-API: 4xxx 0000:06:00.0: device driver frees DMA memory with different size [device address=0x0000000123206c80] [map size=8 bytes] [unmap size=64 bytes]
    WARNING: CPU: 0 PID: 0 at kernel/dma/debug.c:973 check_unmap+0x3d0/0x8c0\
    ...
    Call Trace:
    <IRQ>
    debug_dma_unmap_page+0x5c/0x60
    qat_dh_cb+0xd7/0x110 [intel_qat]
    qat_alg_asym_callback+0x1a/0x30 [intel_qat]
    adf_response_handler+0xbd/0x1a0 [intel_qat]
    tasklet_action_common.constprop.0+0xcd/0xe0
    __do_softirq+0xf8/0x30c
    __irq_exit_rcu+0xbf/0x140
    common_interrupt+0xb9/0xd0
    </IRQ>
    <TASK>

The original commit was correct.

Cc: <stable@vger.kernel.org>
Reported-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>