ata fixes for 7.2-rc2

- Quirk the Phison PS3111-S11 SSD with NOLPM due to its defective link
    power management (Bryam).
 
  - Strengthen checks on a device concurrent positioning range
    information to make sure to reject any invalid report (Bryam).
 
  - Fix probe error handling in the pata_pxa and sata_gemini drivers
    (Myeonghun, Wentao).
 
  - Limit buffer size of replies from translated commands to what libata
    actually generated (Karuna)
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Merge tag 'ata-7.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux

Pull ata fixes from Damien Le Moal:

 - Quirk the Phison PS3111-S11 SSD with NOLPM due to its defective
   link power management (Bryam)

 - Strengthen checks on a device concurrent positioning range
   information to make sure to reject any invalid report (Bryam)

 - Fix probe error handling in the pata_pxa and sata_gemini
   drivers (Myeonghun, Wentao)

 - Limit buffer size of replies from translated commands to what
   libata actually generated (Karuna)

* tag 'ata-7.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
  ata: libata-scsi: limit simulated SCSI command copy to response length
  ata: pata_pxa: Fix DMA channel leak on probe error
  ata: sata_gemini: unwind clocks on IDE pinctrl errors
  ata: libata-core: Reject an invalid concurrent positioning ranges count
  ata: libata-core: Add NOLPM quirk for PNY CS900 1TB SSD

drivers/ata/libata-core.c

@@ -2847,6 +2847,24 @@ static void ata_dev_config_cpr(struct ata_device *dev)
 	if (!nr_cpr)
 		goto out;
 
+	/*
+	 * The device reports the number of CPR descriptors independently of the
+	 * log size, and that count is also used to emit VPD page B9h into the
+	 * fixed-size rbuf. Reject a count larger than what that buffer can hold
+	 * (ATA_DEV_MAX_CPR) or larger than the log the device actually returned.
+	 */
+	if (nr_cpr > ATA_DEV_MAX_CPR) {
+		ata_dev_warn(dev,
+			     "Too many concurrent positioning ranges\n");
+		goto out;
+	}
+
+	if (buf_len < 64 + (size_t)nr_cpr * 32) {
+		ata_dev_warn(dev,
+			     "Invalid number of concurrent positioning ranges\n");
+		goto out;
+	}
+
 	cpr_log = kzalloc_flex(*cpr_log, cpr, nr_cpr);
 	if (!cpr_log)
 		goto out;
@@ -4295,6 +4313,9 @@ static const struct ata_dev_quirks_entry __ata_dev_quirks[] = {
 	/* Apacer models with LPM issues */
 	{ "Apacer AS340*",		NULL,	ATA_QUIRK_NOLPM },
 
+	/* PNY CS900 (Phison PS3111-S11, DRAM-less) drops the link on DIPM */
+	{ "PNY CS900 1TB SSD",		NULL,	ATA_QUIRK_NOLPM },
+
 	/* Silicon Motion models with LPM issues */
 	{ "MD619HXCLDE3TC",		"TCVAID", ATA_QUIRK_NOLPM },
 	{ "MD619GXCLDE3TC",		"TCV35D", ATA_QUIRK_NOLPM },

drivers/ata/libata-scsi.c

@@ -37,8 +37,6 @@
 #include "libata.h"
 #include "libata-transport.h"
 
-#define ATA_SCSI_RBUF_SIZE	2048
-
 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
 
@@ -1933,8 +1931,13 @@ static void ata_scsi_rbuf_fill(struct ata_device *dev, struct scsi_cmnd *cmd,
 	memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
 	len = actor(dev, cmd, ata_scsi_rbuf);
 	if (len) {
+		if (WARN_ON(len > ATA_SCSI_RBUF_SIZE)) {
+			ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
+			spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
+			return;
+		}
 		sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
-				    ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
+				    ata_scsi_rbuf, len);
 		cmd->result = SAM_STAT_GOOD;
 		if (scsi_bufflen(cmd) > len)
 			scsi_set_resid(cmd, scsi_bufflen(cmd) - len);

drivers/ata/libata.h

@@ -149,6 +149,15 @@ static inline bool ata_acpi_dev_manage_restart(struct ata_device *dev) { return
 #endif
 
 /* libata-scsi.c */
+#define ATA_SCSI_RBUF_SIZE	2048
+
+/*
+ * Maximum number of concurrent positioning ranges (CPR) supported. The ACS
+ * specifications allow up to 255, but we limit this to the number of CPR
+ * descriptors that fit in the rbuf buffer used to emit VPD page B9h.
+ */
+#define ATA_DEV_MAX_CPR		min(255, ((ATA_SCSI_RBUF_SIZE - 64) / 32))
+
 extern struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
 					    const struct scsi_device *scsidev);
 extern int ata_scsi_add_hosts(struct ata_host *host,

drivers/ata/pata_pxa.c

@@ -286,6 +286,7 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	ret = dmaengine_slave_config(data->dma_chan, &config);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "dma configuration failed: %d\n", ret);
+		dma_release_channel(data->dma_chan);
 		return ret;
 	}
 

drivers/ata/sata_gemini.c

@@ -353,7 +353,7 @@ static int gemini_sata_probe(struct platform_device *pdev)
 	if (sg->ide_pins) {
 		ret = gemini_setup_ide_pins(dev);
 		if (ret)
-			return ret;
+			goto out_unprep_clk;
 	}
 
 	dev_info(dev, "set up the Gemini IDE/SATA nexus\n");