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| author | Ashok Raj Nagarajan <arnagara@qti.qualcomm.com> | 2016-05-28 11:25:40 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2016-06-02 17:50:29 +0300 |
| commit | 1e56d5127d5c2142fcd26b93f4a9abacbd8f975d (patch) | |
| tree | 9cb1cae533cbeb6b250c240758d1e49fe9016c8b /drivers/net/wireless/ath/ath10k/debug.c | |
| parent | 8a0a36cf98dbe689c31568b4f0ed883b43815cae (diff) | |
| download | kernel_replicant_linux-1e56d5127d5c2142fcd26b93f4a9abacbd8f975d.tar.gz kernel_replicant_linux-1e56d5127d5c2142fcd26b93f4a9abacbd8f975d.tar.bz2 kernel_replicant_linux-1e56d5127d5c2142fcd26b93f4a9abacbd8f975d.zip | |
ath10k: fix diag_read to collect data for larger memory
diag_read uses dma_alloc_coherent to allocate memory requested by the
caller. If this memory requested is larger, more than DIAG_TRANSFER_LIMIT
(2K), then it is likely that we may not get the requested memory and we
would fail.
To solve this, request dma_alloc_coherent for only DIAG_TRANSFER_LIMIT, and
reuse this buffer multiple times as needed to copy the data requested in
smaller chunks of size not more than DIAG_TRANSFER_LIMIT. Previously we
were reading into the caller's only after getting the complete requested
data.
Fixes: 68c03249f388 ('ath10k: convert pci_alloc_consistent() to dma_alloc_coherent()')
Signed-off-by: Ashok Raj Nagarajan <arnagara@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/debug.c')
0 files changed, 0 insertions, 0 deletions