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Ip=[149.199.60.83]; Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR02MB2011 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 104.47.34.78 Subject: [Qemu-devel] [PATCH v1] xilinx_spips: send dummy only if cmd requires it X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" For all the commands, which do not have an entry in xilinx_spips_num_dummies, present logic sends dummy byte when ever we are in SNOOP_NONE state, fix it to send only if cmd requires them. Only transmit max of 1 dummy byte(i.e 8 cycles) is a single snoop cycle. And also convert dummy bytes to cycles (required by m25p80). Signed-off-by: Sai Pavan Boddu --- hw/ssi/xilinx_spips.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c index 426f971..8278930 100644 --- a/hw/ssi/xilinx_spips.c +++ b/hw/ssi/xilinx_spips.c @@ -627,10 +627,17 @@ static void xilinx_spips_flush_txfifo(XilinxSPIPS *s) tx_rx[i] =3D tx; } } else { - /* Extract a dummy byte and generate dummy cycles according to= the - * link state */ tx =3D fifo8_pop(&s->tx_fifo); - dummy_cycles =3D 8 / s->link_state; + if (s->cmd_dummies > 0) { + /* Extract a dummy byte and generate dummy cycles accordin= g to + * the link state */ + dummy_cycles =3D (s->cmd_dummies ? 1 : 0) * 8 / s->link_s= tate; + s->cmd_dummies--; + } else { + for (i =3D 0; i < num_effective_busses(s); ++i) { + tx_rx[i] =3D tx; + } + } } =20 for (i =3D 0; i < num_effective_busses(s); ++i) { --=20 2.7.4