• Alex Elder's avatar
    net: ipa: don't assume SMEM is page-aligned · b8d43803
    Alex Elder authored
    In ipa_smem_init(), a Qualcomm SMEM region is allocated (if needed)
    and then its virtual address is fetched using qcom_smem_get().  The
    physical address associated with that region is also fetched.
    
    The physical address is adjusted so that it is page-aligned, and an
    attempt is made to update the size of the region to compensate for
    any non-zero adjustment.
    
    But that adjustment isn't done properly.  The physical address is
    aligned twice, and as a result the size is never actually adjusted.
    
    Fix this by *not* aligning the "addr" local variable, and instead
    making the "phys" local variable be the adjusted "addr" value.
    
    Fixes: a0036bb4 ("net: ipa: define SMEM memory region for IPA")
    Signed-off-by: default avatarAlex Elder <elder@linaro.org>
    Link: https://lore.kernel.org/r/20220818134206.567618-1-elder@linaro.orgSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
    b8d43803
ipa_mem.c 17.3 KB