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R. Silva" In-Reply-To: <20231213-wmi_host_mem_chunks_flexarray-v1-5-92922d92fa2c@quicinc.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 187.162.21.192 X-Source-L: No X-Exim-ID: 1rDVhn-003Rqk-2r X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 187-162-21-192.static.axtel.net ([192.168.15.10]) [187.162.21.192]:36860 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 27 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfGTerYACd4LRIA58qUGM5sQC6qIjAaI6MNcut4Xkr38LCv1soJAL3VPPTFkhGRfj+6SEmrS3CVpY+8VorEM5dLSd4CkzK467A/QveHgKtVWT4MR6MUay q0qm9r9FtmopsIlLQPaaDGtLraOYvismV+2NU1TDKkgEx2hPWiBQ4PHNsjTLU5/tAMg8xIvdiyXeu0MZoXoa85gSUaqbdy9NMlLH5Sc9oC2eIFVjccMasIJ8 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231213_121948_040597_67E380F6 X-CRM114-Status: GOOD ( 16.22 ) X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "ath10k" Errors-To: ath10k-bounces+ath10k=archiver.kernel.org@lists.infradead.org On 12/13/23 11:06, Jeff Johnson wrote: > Currently struct wmi_tdls_peer_capabilities defines: > struct wmi_channel peer_chan_list[1]; > > Per the guidance in [1] this should be a flexible array, and at one > point Gustavo was trying to fix this [2], but had questions about the > correct behavior when the associated peer_chan_len is 0. > > I have been unable to determine if firmware requires that at least one > record be present even if peer_chan_len is 0. But since that is the > current behavior, follow the example from [3] and replace the > one-element array with a union that contains both a flexible array and > a single instance of the array element. This results in a struct that > has the same footprint as the original, so no other driver changes are > required. > > No functional changes, compile tested only. > > [1] https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays > [2] https://lore.kernel.org/linux-wireless/626ae2e7-66f8-423b-b17f-e75c1a6d29b3@embeddedor.com/ > [3] https://lore.kernel.org/linux-wireless/202308301529.AC90A9EF98@keescook/ > > Signed-off-by: Jeff Johnson Reviewed-by: Gustavo A. R. Silva Thanks! -- Gustavo > --- > drivers/net/wireless/ath/ath10k/wmi.h | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/ath/ath10k/wmi.h b/drivers/net/wireless/ath/ath10k/wmi.h > index e16410e348ca..b64b6e214bae 100644 > --- a/drivers/net/wireless/ath/ath10k/wmi.h > +++ b/drivers/net/wireless/ath/ath10k/wmi.h > @@ -7162,7 +7162,13 @@ struct wmi_tdls_peer_capabilities { > __le32 is_peer_responder; > __le32 pref_offchan_num; > __le32 pref_offchan_bw; > - struct wmi_channel peer_chan_list[1]; > + union { > + /* to match legacy implementation allocate room for > + * at least one record even if peer_chan_len is 0 > + */ > + struct wmi_channel peer_chan_min_allocation; > + DECLARE_FLEX_ARRAY(struct wmi_channel, peer_chan_list); > + }; > } __packed; > > struct wmi_10_4_tdls_peer_update_cmd { >